While many cases of ownership are shown with possessive nouns (Karen's, children's), possessive adjectives are not nouns and are not formed by adding an apostrophe + s. It is used as an adjective and modifies a noun or a noun phrase, as in the following sentences:

• • I can't complete my assignment because I don't have the textbook.

In this sentence, the possessive adjective "my" modifies "assignment" and the noun phrase "my assignment" functions as an object. Note that the possessive pronoun form "mine" is not used to modify a noun or noun phrase.

• • What is your phone number.

Here the possessive adjective "your" is used to modify the noun phrase "phone number"; the entire noun phrase "your phone number" is a subject complement. Note that the possessive pronoun form "yours" is not used to modify a noun or a noun phrase.

• • The bakery sold his favourite type of bread.

In this example, the possessive adjective "his" modifies the noun phrase "favourite type of bread" and the entire noun phrase "his favourite type of bread" is the direct object of the verb "sold."

• • After many years, she returned to her homeland.

Here the possessive adjective "her" modifies the noun "homeland" and the noun phrase "her homeland" is the object of the preposition "to." Note also that the form "hers" is not used to modify nouns or noun phrases.

• • We have lost our way in this wood.

In this sentence, the possessive adjective "our" modifies "way" and the noun phrase "our way" is the direct object of the compound verb "have lost". Note that the possessive pronoun form "ours" is not used to modify nouns or noun phrases.

• • In many fairy tales, children are neglected by their parents.

Here the possessive adjective "their" modifies "parents" and the noun phrase "their parents" is the object of the preposition "by." Note that the possessive pronoun form "theirs" is not used to modify nouns or noun phrases.

• • The cat chased its ball down the stairs and into the backyard.

In this sentence, the possessive adjective "its" modifies "ball" and the noun phrase "its ball" is the object of the verb "chased." Note that "its" is the possessive adjective and "it's" is a contraction for "it is." The words its and it's are pronounced the same, but they have different meanings and grammar.

NOTE:

Adjectives are not plural in English, so possessive adjectives have only one form. For example:

• • That is our cat. Those are our cats.

Notice that some forms of the possessive adjective and possessive pronoun are the same (his, its). So, you have to look at how they are used in the sentence.